US657307A - Indigo-white compound and process of making same. - Google Patents

Indigo-white compound and process of making same. Download PDF

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Publication number
US657307A
US657307A US1754600A US1900017546A US657307A US 657307 A US657307 A US 657307A US 1754600 A US1754600 A US 1754600A US 1900017546 A US1900017546 A US 1900017546A US 657307 A US657307 A US 657307A
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Prior art keywords
indigo
white
making same
white compound
stable
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US1754600A
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Max Bazlen
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BASF SE
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BASF SE
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B9/00—Esters or ester-salts of leuco compounds of vat dyestuffs

Definitions

  • My invention relates to the production of a new compound of indigo-white,which is stable in the presence of air, but whichiby the action of caustic alkalies is readily reconverted into indigo-white or indigo.
  • My new body can be obtained by acting on indigo-white suspended or dissolved in water,
  • acetone, alcohol, or other suitable medium tion product separates out as a difficultlysoluble body and is filtered ofi. To obtain the remainder neutralize the filtrate with solid sodium carbonate and distil ofi the acetone.
  • My new product is a powder, which is, as a. rule, more or less dark colored and is stable in the presence of air. It is difficultly soluble or insoluble in most of the ordinary solvents and cold dilute caustic soda, but is somewhat soluble in boiling acetone. On warming with caustic-soda lye it is reconverted into indigowhite. By heating with concentrated sulfuric acid and pouring into water a blue solution is obtained.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)

Description

UNITED STATES PATENT OFFICE.
MAX BAZLEN, OF LUDWIGSHAFEN, GERMANY, ASSIGNOR To THE BADISOHE ANILIN AND SODA FABRIK, OF SAME PLACE.
INDIGO-WHITE COMPOUND AND PROCESS OF MAKING SAME.
SPECIFICATION forming part of Letters Patent N 0. 657,307, dated September 4, 1900.
Application filed MayZZ, 1900. Serial No. 17,546. (No specimens.) I
To all whom it may concern.-
Be it known that I, MAX BAZLEN, doctor of philosophy, a subject of the King of Wiirtemberg, residing at Ludwigshafen-on-the-Rhine, in the Kingdom of Bavaria and Empire of Germany,have invented new and useful Improvements in Stable Indigo-White Compounds of which the following is a specification.
My invention relates to the production of a new compound of indigo-white,which is stable in the presence of air, but whichiby the action of caustic alkalies is readily reconverted into indigo-white or indigo. I
My new body can be obtained by acting on indigo-white suspended or dissolved in water,
acetone, alcohol, or other suitable medium tion product separates out as a difficultlysoluble body and is filtered ofi. To obtain the remainder neutralize the filtrate with solid sodium carbonate and distil ofi the acetone.
Instead of acetone water or alcohol may be employed in the above example. When using alcohol, however, the product obtained is not quite so pure.
My new product is a powder, which is, as a. rule, more or less dark colored and is stable in the presence of air. It is difficultly soluble or insoluble in most of the ordinary solvents and cold dilute caustic soda, but is somewhat soluble in boiling acetone. On warming with caustic-soda lye it is reconverted into indigowhite. By heating with concentrated sulfuric acid and pouring into water a blue solution is obtained.
Now what I claim is 1. The process of producing a stable indigowhite body, by treating indigo-white with phosgene.
2. The process of producing an indigowhite body by treating indigo-white with phosgene in the presence of caustic soda.
3. As a new product, the body which can be obtained by treating indigo-white with phosgene which is stable in the presence of MAX BAZLEN.
Witnesses:
PERCY J. JONES, J. L. HEINKE.
US1754600A 1900-05-22 1900-05-22 Indigo-white compound and process of making same. Expired - Lifetime US657307A (en)

Priority Applications (1)

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US1754600A US657307A (en) 1900-05-22 1900-05-22 Indigo-white compound and process of making same.

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US1754600A US657307A (en) 1900-05-22 1900-05-22 Indigo-white compound and process of making same.

Publications (1)

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US657307A true US657307A (en) 1900-09-04

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